Soft Oedometer—A New Testing Device and Its Application for the Calibration of Hypoplastic Constitutive Laws

    Volume 16, Issue 2 (June 1993)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Page Count: 8


    Kolymbas, D
    University of Karlsruhe, Institute of Soil and Rock Mechanics,

    Bauer, E
    University of Karlsruhe, Institute of Soil and Rock Mechanics,

    Abstract

    The problem addressed is how to obtain the material parameters of soils and other granular materials by means of a simple and fast laboratory test which fulfills the requirement of homogeneous specimen deformation. A new laboratory testing device called “soft oedometer,” characterized by an extensible lateral supporting ring, makes it possible to measure not only the vertical but also the lateral stress and strain of the specimen. The construction principles are presented as well as test results. The suggested evaluation of the latter makes it possible to determine the friction angle and all parameters entering hypoplastic constitutive equations without the need to achieve the limit state.

    In the present paper, the new apparatus is shown to make possible a particular test (oedometric test) which serves to fit a mathematical model called “hypoplastic constitutive law.” Using this model, other test types can be simulated realistically.


    Paper ID: GTJ10044J

    DOI: 10.1520/GTJ10044J

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    Author
    Title Soft Oedometer—A New Testing Device and Its Application for the Calibration of Hypoplastic Constitutive Laws
    Symposium , 0000-00-00
    Committee D18